Food webs and the limiting factors associated with it

• ​An ecosystem Includes all living and non-living parts of the environment as well as the interactions among them.

• ​Biotic factors are living parts of an ecosystem which includes remains and wastes.

  Non-living parts of an ecosystem which includes light, temperature, weather, soil and water

​

Important Information

​If there's not enough food or water, individuals will die through starvation, desiccation (the removal of moisture from something) and stress, or they will fail to produce offspring.

Food and water

​Competition would increase. Lack of resources would affect the local population and the carrying capacity of the area would suffer.

​​Space

​Exposure to the elements or predators is a major factor.

Shelter

​Limiting Factors to take into consideration

Multiple Choice

In the graph to the right, what is the population of deer at the carrying capacity of the environment?

• 3

• 7

• 70

• 40

Multiple Choice

What is the carrying capacity of the graph?

• around 500

• more than 500

• less than 500

• around 600

​

• ​Limiting Factors are conditions of the environment that limit the growth of a species.

• Because of these limiting factors, each ecosystem has a finite capacity for growth connected to its carrying capacity.

Limiting Factors

Multiple Choice

What will happen if all of the frogs in a population die?

• The frogs' predators will decrease and the frogs' prey will increase

• The frogs' predators will increase and the frogs' prey will decrease

• We better all pray because there isn't anymore frogs.

Multiple Choice

Food, water, sunlight, shelter, and space are resources that are  __________.

• limiting factors

• wet

• messy

• found in rocks

Multiple Choice

Look at the blank Energy Pyramid.  Which Trophic Level is where we would find the Tertiary Consumers?  

• The bottom level

• The second from the bottom level

• The top level

• The second from the top level

• First-order consumers feed directly on producers

• Second-order consumer feed on first-order consumers

• Third-order consumer feeds on second-order consumers

​

Food Chains and Food Webs

Draw

Circle the 1st level consumer

​

• Decomposers are organisms that gets energy by breaking down the remains of dead organisms and the wastes of living things.

• ​Producers make their own food through photosynthesis.

• Ecosystems get all energy from the sun! ​

​

​

Food Chains and Food Webs

Match

Match the following

• producers

• consumers

• decomposers

organisms that create their own food through photosynthesis

organisms that consume other organisms

organisms that break down matter such as the remains of organisms

• organisms that create their own food through photosynthesis

• organisms that consume other organisms

• organisms that break down matter such as the remains of organisms

Multiple Choice

Which of the following organisms is not a producer?

• grass

• trees

• algae

• bacteria

Match

Match the following

• producers

• 1st level consumers

• 2nd level consumers

• 3rd level consumers

• 4th level consumers

make their own food

eat producers

eat 1st level consumers

eat 2nd level consumers

eat 3rd level consumers

• make their own food

• eat producers

• eat 1st level consumers

• eat 2nd level consumers

• eat 3rd level consumers

Multiple Choice

Which of the following is not shown as a primary consumer

• black bear

• beaver

• pine vole

• bobcat

Multiple Choice

Which of the following has the smallest population?

• persimmon trea

• beaver

• silver maple

• bobcat

​

• Animals coexist when they live in the same habitat but rely on different resources

  Mutualism is a relationship in which both species benefit

​

Animal Relationships​

Multiple Choice

when two living organisms live together, sometimes to benefit both--but not always

• food chain

• parasitism

• symbiosis

• ecosystem

Multiple Choice

a relationship between two species that benefits both of them

• mutualism

• commensalism

• parasitism

• competition

Multiple Choice

a relationship between two species that benefits one of them, but the other is not harmed or helped

• mutualism

• commensalism

• parasitism

• competition

Multiple Choice

a relationship between two species that benefits one of them, and the other is harmed

• mutualism

• commensalism

• parasitism

• competition

​

• Commensalism is a relationship where one species benefits without benefiting or harming the other species

• Parasitism is a relationship between a parasite and its host where one species benefits and the other is harmed.

​

​

​Animal Relationships

Multiple Choice

How many primary consumers are in this food web?  

• 1

• 2

• 3

• 4

Multiple Choice

What organism consumes both rabbits and birds?

• The Hawk

• The Wolf

• The Plant

• The Mushroom

Multiple Choice

Which of the following are abiotic factors in an environment?

• People

• Cow

• Salinity

• Chicken

Multiple Choice

What level consumer could you consider the deer?  

• Primary

• Secondary

• Tertiary

• Quarternary

Multiple Choice

A secondary consumer will gain energy from what level consumer?  

• Producers

• Primary Consumers

• Tertiary Consumers

• Apex Predators

Multiple Choice

Arrows in a food web represent...

• eating

• sunlight

• energy

• matter

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